Oxide-dispersion-hardened superalloy based on nickel
US4995922A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1989 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Jan 11, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C32/0026
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Oxide-dispersion-hardened superalloy based on nickel, which is composed of the following main constituents: ______________________________________ Cr = 5-13.95 percent by weight or 14.05-22 percent by weight Al = 2.5-7 percent by weight Mo = 0-2 percent by weight W = 0-15 percent by weight Ta = 0-7 percent by weight Hf = 0-1 percent by weight Ti = 0-3 percent by weight Zr = 0.02-0.2 percent by weight Co = 0-10 percent by weight C = 0-0.2 percent by weight Y.sub.2 O.sub.3 = 1-2 percent by weight Ni = Remainder, ______________________________________ and which additionally contains boron in a content of 0.026 to 0.3 percent by weight. A process for extending the temperature range of the secondary recrystallization of an oxide-dispersion-hardened nickel-base superalloy of the above composition during coarse-grain annealing and during the production of a monocrystal with a cross section of at least 5 cm.sup.2 by doping with a boron content of at least 0.011 percent by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.